用N-苯甲酰-N-苯基胲(以下简称为BPHA)的三氯甲烷或异戊醇溶液能从强酸性溶液中萃取钛。在有机相中的钛-BPHA络合物呈黄色,仅能作分离毫克量钛之用。我们找出将硫氰酸铵加到酸性溶液中,即能提高钛的萃取率和增加有机相的颜色,这有利于萃取后随即测定萃取液的光密度。 Titanium can be extracted from strongly acidic solutions with chloroform or isoamyl alcohol solution of N-benzoyl-N-phenylstilbene (hereinafter abbreviated as BPHA). The titanium-BPHA complex in the organic phase is yellow and can only be used for the separation of milligrams of titanium. We find that adding ammonium thiocyanate to an acidic solution increases the extraction rate of titanium and increases the color of the organic phase, which facilitates the determination of the optical density of the extract immediately after extraction.